Depends on how you selected the other matches. I had us winning all but Hawthorn and I left the 12 point margins for all games. So percentage will play a role too, but yeah, I have North winning 3 more, which I'd say is fairly realistic. Us winning 6 more is pretty unrealistic so yeah, it's not going to happen.
Hopefully they can make the rest of what remains of the season enjoyable for us though.
Norf's easiest games in the run home are against us, the Saints and Power. On current form and injury status those games are no better than 50/50 for them. Even if they go 2/3 from those with us winning I reckon they lose all the other ones against the top 8 sides.