While logged in, click on "My Blog Posts" in the upper left to view all of your blog posts. Find the blog post with the unwanted comment and click on the title to view the entire blog post and scroll down to the bottom to see the comments. Click "Delete" on the unwanted post to remove it permanently.
I am a manI will not write about myself because a person can be fully understood by someone when the latter begins to communicate with the former and inversely.