The original article is full of overly specific details that are typical of fabricated stories; he's not just talking to a hiring manager, he's talking to the CEO. The CEO wasn't just happy with his answer, he had to pick his jaw up off the floor, etc.

The commenter you're responding to gave a very typical template of how you're supposed to respond to the question (and how anyone who has any aptitude for sales would.) It's nothing special, and that's the point.

His account talks about his overly verbose question and answer session and a bit of a click-baity "when they heard his response, they were floored!" ending.

Mine was a bit of I ascertained their need, talked up some of the benefits and the interviewer was like, "cool, you passed, we'll keep speaking". It wasn't an epic revelation that floored people. It was just, "okay, you have some sales skills, let's keep going."