Given the company's performance record and based on the empirical rule of normal distribution (also known as the 68%-95%-99.7% rule), what would be the uupper bound of the range of sales values that contains 68% of the monthly sales? NOTE: Enter a numerical value only, do not include the $ sign; and round your response to 2 digits after the decimal point. If you do not follow these formatting and rounding rules, you may not receive credit for your answer..Mean is 8235.78 and standard deviation is 780.92