Here's the answer:
“ナルトって知っていますか?”
(naruto tte shi-tte i-masu ka?)
Watch a real native speaker say it:
Here's how it sounds in a textbook:
You could also say:
- ナルトって知ってますか?
Fun fact: the hundreds of thousands of people learning Japanese with Memrise get this phrase correct 91.55% of the time!