The export filter will produce a basic rtf-file from your Access-report, that's why all graphics are lost in conversion.
Consider three alternatives:
1) print your report to a pdf-file;
2) study pro's and con's of the Access Snap-shot format. Not used frequently I guess, since the receiver of the snapshot report needs to have the free snapshot reader installed;
3) Study a mailmerge to bookmarks in Word from within Access. The graphics will be in the Word document/template, that is filled with data placed in bookmarks. Discussed on this forum before, search on entry:
"Automately updating Word file based on Access data"
hth