Although opinions can tend to be very subjective about scores, I would say anything above 90% should be considered a really good score. The exam is quite dificult and the passing percentage is really low. Lets not forget, the employers may not care as much for your score( and transcripts) as they probably do for the certificate it self.
Open Group Certified Distinguished IT Architect. Open Group Certified Master IT Architect. Sun Certified Architect (SCEA).