Yes, you can!
If you go to the page of any of your images you’ll see an “Edit” button below the image. This will take you to a page where you can edit the Title, Description, Tags and Price of any image on your profile.
STEP 1 - find the 'Edit' button underneath the image
STEP 2 - on the 'Edit your pic' page you'll be able to make edits here. Remember to click 'Save' when you've finished making any changes!