NEWTON, Mass. — A Massachusetts man charged with stabbing a 79-year-old shopper inside a supermarket has been ordered to undergo a mental health evaluation.A not guilty plea to a charge of assault with intent to murder was entered on behalf of 23-year-old Matthew Muradov at his arraignment Tuesday. A judge ordered him to Bridgewater State Hospital for the evaluation.Newton police say they responded to the Star Market in the Auburndale section of the city at about 2 p.m.