On the four exams in pre-calc, Jane earned an 84, 87, 91, and 93. If all exams are weighted equally, nothing else determines her grade, and 100 is the highest she can score on an exam, what minimum score does Jane have to get on her fifth exam to bring her mean score to 90?

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On the four exams in pre-calc, Jane earned an 84, 87, 91, and 93. If all exams are weighted equally, nothing else determines her grade, and 100 is the highest she can score on an exam, what minimum score does Jane have to get on her fifth exam to bring her mean score to 90?