You can either go to windows>animation editors>graph editor, or go to the time line, click and drag over the keys you want. Then at the ends of the selection, and the middle, there should be arrows. the ones in the middle move it. the ones at the ends scale it. To move them, middle click and drag. I would recomend scaling, because then you have to put your keys at the frame numbers manualy.

to delete them, select the keys, then hit the delete key on your keyboard.