How to do scroll in box2d world?


I created a world based on a tilemap box2d (i read the map and create box2d objects)

On the screen i view only part of the world, and I want to scroll it, I think the box2d does not allow as the tilemap, changing the position to do the scroll, does anyone know how I can do? (the idea is to do something like Mario Bros scroll)

Thank you!
Pd. Sorry for my poor english