Clearly he's saying that if he comes it won't be to be 8th - we want to move up, we've just failed in this pursuit for the last 5 years.
He'll know very well that since Moyes left we've stagnated (the first Roberto year was a bit of a fluke if we're honest, he made some good signings, and rode out the capital Moyes has built without maintaining or renewing it) or regressed.
Mourinho has the ambition to move us up. I thinking he's asking the club if they are as committed as he is (financially and in every other way).
I saw something about Brands stating that the club and the players are behind Silva. This gives nothing away. If they weren't talking to potential repalcements, he'd say this, and if they are he'd say this too, right up until the moment they organize the press conference and announce Silva's sacking and the appointment of the new fellow in one fell swoop.