Of course you can. Login to your blog, and click Archives menu option, and you'll see a panel on the right. Third tab along is Feedback. Click it to see a list of the feedback available.

Then simply locate the offending comment you wish to edit and click on the text.
This will open a small window which will allow you to view, edit, reply-to and report-as-spam the comment in question.
You might notice some icons on the right of each comment. These stand for
Visit the entry,
Delete the entry and
Approve the entry.