In a class on advanced water buffalo husbandry, the midterm exam raw scores (i. e., the values of x) form a normal distribution, with a mean of 239 and a standard deviation of 37. 6) [5 pts.] what percentage of exam scores are more than 1.5 standard deviations of distance away from the mean? 7) [5 pts.] what proportion of students had an exam score between 180 and 250? 8) [5 pts.] 20% of the students had an exam score that was higher than what value? 9) [5 pts.] which exam score corresponds to the 67th percentile?