In a certain section of Southern California the distribution

In a certain section of Southern California, the distribution of monthly rent for a one-bedroom apartment has a mean of $2,175 and a standard deviation of $250. The distribution of the monthly rent does not follow the normal distribution. In fact, it is positively skewed.

What is the probability of selecting a sample of 70 one-bedroom apartments and finding the mean to be at least $2,115 per month?