Apparently, the correct answer is 94 degrees.
I interpret the 'abeam' point as when you are at a 90 degree angle from the station, rather than 90 degree angle from the aircraft to the station.
For them to get 094 degrees, abeam must mean when the aircraft is at 90 degrees to the station, i.e have gone past the NDB, when your nose is pointed slightly towards it, having to go further is attain a 90 degree angle.
I would imagine, if the nose is pointed slightly away from the NDB, the abeam point would be reached before you actually get to the 90 degree angle from the station.
Very confusing.