A SRS of 21 orangutans is selected, and 65 cc of blood is drawn from each orangutan using a 100 cc syringe. This method does not result in exactly 65 cc being drawn each time. Instead, this method results in normally distributed draws with mean 65 cc and standard deviation of 15 cc. What sample mean is higher than 81% of all other sample means? (Give answer to 2 decimal places.)