Why won't my cloud effect work? Moving a player 30 studs away!

Before I get to the solution, I'm going to go through your script and explain a few things you shouldn't do.

The first thing is in multiple instances there, you've referenced specific body parts of the Character that is being hit, and that would be fine if you are changing visual properties like Transparency or Color, or like what you did in the beginning with adding smoke to their Torso. However, when you want to change the position of the entire Character, it's a lot safer to use their HumanoidRootPart.

Next thing is that you are tweening the Character's Head's position, but when you move or teleport a Character, you almost always want to use the Character's HumanoidRootPart's CFrame.

Last thing is simply that you've got some completely useless lines (like 17 and 18) as you've already said. Including things like getting the Head from the Torso's parent instead of just making a variable for the Character and just doing something like char.Head. Also this is just my opinion on keeping things organized, but creating objects like Smoke in ServerStorage without renaming it or putting it in a folder before using it is not a good practice, but it's not a problem if you keep it that way.

So now the solution:

--instantiate all unchanging variables outside of the event
local info1 = TweenInfo.new(
	    4,
	    Enum.EasingStyle.Quad, --you might want to change this if the float effect isn't exactly what you wanted
	    Enum.EasingDirection.In,
	    0,
	    false,
	    0
)
local Smoke = game.ServerStorage.Smoke

-- a function for creating tweens
local function tween(object,info,goals)
	return game:GetService("TweenService"):Create(object,info,goals)
end

script.Parent.Handle.Touched:Connect(function(OtherPart)
	if OtherPart.Parent:FindFirstChild("Humanoid") then
		local HRP = OtherPart.Parent.HumanoidRootPart
		Smoke:Clone().Parent = HRP
		HRP.Anchored = true
		local Pos = HRP.CFrame.Position
		local goal1 = {
			CFrame = CFrame.new(Pos.X,Pos.Y+60,Pos.Z)
		}
		local Tween = tween(HRP, info1, goal1)
		Tween:Play()
		wait(4)
		Smoke:Destroy()
		HRP.Anchored = false
	end
end)

I put the smoke in the HumanoidRootPart because you will already be using it for doing the cloud effect, and the HumanoidRootPart is a transparent part centered on the torso, where the original smoke effect was held.