The Jets would actually be higher up in the playoff picture with a Chiefs win. A Chief win would tie them with the Broncos, who have a better conference record than all the other teams going for the final playoff spot, but the Chiefs have a better division record than the Broncos putting them ahead of the Broncos.
The Chiefs have a bad conference record though and would be beneath the Jets in the wildcard, putting the Jets only beneath the Jags because Jacksonville beat them.
If the Chiefs lost, then the Broncos would be ahead of both the Jets and Jags because of the better conference record.
Very complicated.