If I have 7 points and kill Draven Audacious, does that point score to win?

Yes, if you have 7 points and you kill an opponent's Draven, Audacious in combat, that point will score, bringing you to 8 points and winning you the game.

Reasoning

According to RiftJudge FAQ #8575 and Rule 448.1.a.1:

1. Exemption from Final Point Restrictions: Points earned from triggered abilities (such as Draven, Audacious's death trigger) are not "Conquer" or "Hold" actions. Therefore, they are not subject to the "Final Point" restrictions that normally require you to have scored every battlefield in a turn to reach 8 points.
2. Timing: When your opponent's Draven, Audacious dies in combat, its death trigger goes on the chain. When that trigger resolves, you choose an opponent (yourself) to score 1 point.
3. Winning the Game: As soon as you hit 8 points, you win the game immediately, as per Rule 467 ("...accrued Points greater than or equal to the Victory Score... they Win the Game").

This interpretation is based on the interaction between Rule 448.1.a.1 and the rules for triggered abilities. No official FAQ exists for this specific interaction, but it is consistent with the established handling of Draven's death trigger.