In short, is it possible to get to the regarde menu in New Quizzes for essay style questions?

I realized after giving a test that one of the Essay questions has the wrong point value. With other questions types (multiple choice, matching, true/false) you can get the option to "regrade" when going through Speedgrader that will allow you to change poitn values but I can't find this option for essay style questions. Does any one know how to change the point value of a essay question after student have taken the assessment.