In Course Navigation, click the Quizzes link.
Click the name of the quiz you want to open.
In the sidebar, click the SpeedGrader link.
In the Student drop-down menu, select the name of the student whose quiz you want to view.
In the Fudge Points field at the bottom of the window, enter the number of points you want to add to the overall quiz score. You can also enter negative points.
The Final Score area will show you what the final score would look like based on the number of fudge points.
When you are ready to change the student's quiz score, click the Update Scores button.