The Executive Camera Company provides full expenses for its sales force. When attempting to budget automobile expenses for its employees, the financial department uses mileage figures to estimate gas, tire, and repair expenses. Distances driven average 5,650 miles a month, and have a standard deviation of 120. The financial department wants its expense estimate and subsequent budget to be adequately high and, therefore, does not want to use any of the data from drivers who drove fewer than 5,500 miles. What percentage of Executive's sales force drove 5,500 miles or more?