If it saids on someones profile their answers and questions are private do they show up under your question?

I mean if they've answered it obviously.

I ask this because I got an answer from a person who was not visible on the screen when I went into the question. When I went in to his profile (I have my answers thing set up to e-mail me when I get a new answer) his answers and question were marked as private. Does this mean that they cannot be seen by anyone other than him because I have done it with other people whose questions and answers have been private and their answers show up under the question they answered