For our purposes, 68 will work fine. And so if we're looking at just from the mean to one standard deviation above the mean, it would be half of that. So this is going to be approximately 34%. Now, we also know that for a normal distribution, the area below the mean is going to be 50%. So we know all of that is 50%. And so the combined area below 170, below one standard deviation above the mean, is going to be 84%, or approximately 84%. And so that helps us figure out what is the area above one standard deviation above the mean, which will answer our question.