Computation of Hunter´s return from selling his shares in the mutual fund:

Given,

Hunter Invested $7,000 in the Mutual fund with a load of 7% at a NAV per share of $70.

So, 

He would have got (7,000*(1-7%))/$70  = $6510/$70 = 93 shares

Later he sold the shares at a NAV per share of $68

So, 

Amount He got by selling the shares = 93*$68 = $6,324

Return on Mutual Funds = (Amount got by sale - Amount invested)/Amount invested * 100

= (6324-7000)/7000 * 100 

Return on Mutual Funds = - 9.66%