The "normal" high temperature for a june day in albemarle is $82^\circ$ (degrees fahrenheit). last year, the first ten days of june were unusually hot, with highs of $84^\circ,$ $88^\circ,$ $91^\circ,$ $92^\circ,$ $96^\circ,$ $94^\circ,$ $89^\circ,$ $78^\circ,$ $87^\circ,$ and $81^\circ$. how many degrees above normal was the average high for that 10-day period?