You can get fractions of an inch by adjusting the strings and cables. However if you need more than 1/4" adjustment you will make the cam rotation feel terrible.
Call Hoyt and find out what size cam you need and what size strings & cables you need. Then get on here and/or Archerytalk and post the size cams you need. You will probably find them for around $80. Then order up your new strings and cables, if necessary.