move object with Vector3 by position

i have multiple Game Objects in different positions and i want to move each on of them
down alone on any click when mouse enter in example :

wall position 1, 0.7, 1

wall position 6, 0.7, 3

wall position 2, 0.7, 2

wall position 5, 0.7, 5

wall position 3, 0.7, 4

wall position 4, 0.7, 6

and i want all of them in the same (x, y) pos and need to move them just on the y axis THIS IS THE SCRIPT

var OnOff : boolean;
var wall : GameObject;
var target : GameObject;

function Start ()
{
	OnOff = true;
}


function OnMouseEnter ()
{	
        renderer.material.color = Color.black;


	if (OnOff == true)
	{
		if (Input.anyKey)
		{
			transform.position = Vector3(wall, target, wall);
			OnOff = false;
		}
	}
}

function OnMouseExit ()
{
	renderer.material.color = Color.white;
}

You should use transform.Translate() method, read THIS.