How Can I Change the Position of a Moving Object?

game.Workspace.qqw.RemoteEvent.OnServerEvent:Connect(function()
	--custom
	
	x = 12
	y = 10
	z = 2
	t = 5
	game.Workspace.qqw.Size = Vector3.new(x,y-t,z)
	
	--custom

end)

I'm using this script. I wanna use the same for position too. But positions won't be stable so I can't use variables. Please help