A student took a history exam and a biology exam on the same day. The history exam had a class average of 85.2 with a standard deviation of 4.3. The student scored 89 on the History exam. The biology exam had a class average of 68.7 with a standard deviation of 8.4. The student scored 80. Which exam did the student score better on relative to the others in the class? Explain your answer.