What is the expression for the end of a tiled sprite?

I have a tiled sprite that extends on keyboard press. I have an object that I want to always be at the end of the tiled sprite. I can get it to sort of follow it using a ‘put object around another’ but that attaches to the center point of the tiled sprite. As you can add ‘points’ onto a tiled sprite is there anyway to get it to recognise the end of the sprite?

The end of the tiled sprite is its X position + Width and Y position + Height.