Before proceeding, you should take a look at the articles: Completion Breakdown
You can view all store/recipient responses to questions or you can view each response one-by-one.
View Individual Responses
From the dashboard click into a task that has been sent with some questions included in it. Select the recipient that you're interested in.
Scroll to the bottom of this recipient's task to view their responses to all questions.
View all Responses
To view all responses from all recipients you can export a breakdown to Excel at any time. This option is available from the menu in the bottom right of the Completion Breakdown page.