If only one shoe comes up short (high) then the brake isn't symmetrical and you need to readjust the small centering screw on top (if there is one) so both arms line up evenly on top.

Otherwise the brake is simply too short. Depending on how much room you need you have a few options. It appears pretty close in the photo, so here are some options which can be used singly or in combination.

1- buy a longer brake
2- shave the tops of the shoes at an angle so they don't overhang the rim. Use a swiss rasp, coarse file, or coarse sandpaper wrapped around a paint stirrer.
3- file the bottom of the slots on the brakes so the shoes can go a bit lower (2mm max is safe, more isn't)
4- file the tops of the dropouts so the wheel sits higher, 2mm is fine, but you have to do this right
5- file the mounting holes in the fork (front and back) so you can lower the brake. This won't work if the brake uses a recessed nut in back.

Good luck