Greg is in his first semester at a university and is taking a calculus course with a large enrollment. He just took the first midterm exam and is nervous about his score. Among all the students in the course, the mean of the exam was 55 with a standard deviation of 7. Greg scored a 74 on this exam. Find the z-score of Greg's exam score relative to the exam scores among all the students in the course. Round your answer to two decimal places.

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