In principle, at least in some places, you can request an independent regrading for your written exams, as far as I know. The upside is, apparently, a few extra points and, possibly, going one shade of grade up (if you have anywhere to go; normally 90%+ means an A anyway). The downsides are
1) Getting at odds with your instructor (never really pays off, if you ask me)
2) The risk that your grade will get even lower (unless you are totally sure that your answers are 100% correct)
3) Creating a reputation of somebody who complains too much about too minor issues.
It is up to you to decide if you want to play this game. If you do, just visit the department chair office and politely ask what the rules for making such requests are.
As to the oral presentation, it is gone. Nobody (neither you, nor your instructor) can prove beyond doubt anything about what happened there now. You'll just enter a long and mainly pointless discussion about who heard what and how to measure "fairness". Besides, it is one of the cases when the scores are going to be at least partially subjective no matter what.