First, access your survey by going to the "Marketing" menu and choosing "Surveys" from the drop down menu. Then from the list of surveys, click on the survey you for which you would like to see the results. To the right you will be able to see who has answered the survey and who hasn't. To see the responses, click on the button "Statistics."
Here you will be able to see a chart of the responses, if you scroll over the chart it will show you the percentages of each answer.
If you click on the details tab in the right corner it will let you see a break down of each question, who responded, and if there was an open-ended question, you can see their responses.