To check all your blog post comments, simply go to the Cog Wheel Icon > Messages > Blog Tab > Comments.
The information is placed in the following order:
You can use this information to contact your visitors via email.
To remove a comment from a blog post, you can follow the steps above and locate the comment that you want to remove. In the comment, you would see a Bin icon on the right. Clicking on the Bin icon and confirming the deletion would remove the comment.