normally you should see your right and wrong answers on the final page of the assessment (at least, if there were wrong answers). Unfortunately this information does not help you until the next time you take the assessment.
Hm...I don't plan to take it again, since I passed. I definitely don't recall seeing the right/wrong answers. That occurred with the Open Assessment, but not in the official one. Would really like to know what I'm misunderstanding from Scrum.org's perspective.