Im doing this wrong.

The physical plant at the main campus of a large state university receives daily requests to replace florescent light bulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 55 and a standard deviation of 7. Using the empirical (68-95-99.7) rule, what is the approximate percentage of light bulb replacement requests numbering between 34 and 55? Do not enter the percent symbol.

Answer = %