[Help-bash] script help please

[Randy]

   I'm sorry this will seem like a simple question - but I've already
   asked my more bash-literate friends.  We're stuck.
   There is a command I use frequently:
   find *.pdf -exec sh -c 'pdftotext "{}" - | grep --with-filename
   --label="{}" --color "XXXX"' \;
   (where "XXXX" is the text for which I am search PDF files.)
   I tried to write a script, where I could simply pass-in ($1) the
   string.  Could not make it work.
   I would greatly appreciate help with this syntax.
   Thank you,
   Randy