Script not changing npc height locally?

So I have this script that changes a height of an npc that was brought to the workspace by cloning it from rs (locally) and when trying to change its height, it does not work, any help? here is the script (print statement works)

script.Parent.Parent.Parent.Parent.AddOneInch.MouseButton1Click:Connect(function()
wait(0.0001)
local h = script.Parent.Value
game.Workspace:WaitForChild("HatDummy3").Humanoid.BodyHeightScale.Value = h
print("gave height")
wait()
end)