For women aged 18-24, systolic blood pressures (in mm Hg) are normally distributed with the mean of 114.8 and standard deviation of 13.1 (based upon data from National Health Survey). Hypertension is commonly stated as a systolic blood pressure above 140. If woman between the ages of 18 and 24 is randomly selected, find the probability that her systolic blood pressure is greater than 140.