Translation:I will answer that question tomorrow.
No, but you have to be careful with the connotations. Replying to something said means just giving a response to what was said; it doesn't specifically mean giving an answer to a question. For instance, I could reply to your question with 'I'm sorry, what did you say?', or I could even reply to a statement which is not a question ('That is not true!' 'Are you sure?' et cetera). Answering a question, however, has the specific meaning of giving the answer to the question.