mine is high too and I have the dead ringer sights on it (for my wife) and I hate them.  they are a decent little sight but a pain to move if need be.  I don't know how to get it to shoot lower except to shim the front sight and raising it a tad.  I have and it still is high..i give up.  aim for the waddles and let it go
the left/right adjustment on the dead ringer is aggravating to me, but it somewhat works.