Tiled Map Landscape move on z axis?

So I’ve run into a small snag with my tiled map. I was able to get it imported in and it’s at the res and size I need it at. I had to take and scale the z axis by 400% when I imported it in for things to work properly. I have managed to move my map where it needs to be according to the x and y axis through the world compositor. However I am unable to move the landscape at all via the Z axis. I’ve tried selecting them individually or as a whole, and it is greyed out and incapable of being adjusted on it’s position for any of the tiles. What can I do to adjust this?