[Boost-users] advance calculation statistical calculation

hello. using boost::math::normal, mean and sd can I retrieve the value corresponding with percentage of the space of the created by the function which is bounded by the bell borders and a straight vertical line? e.g. the corresponding x value of the red line (by calculation of the space between the blue bell borders and the red vertical line in this picture http://img714.imageshack.us/img714/4789/normal2.png thanks