Under the new rules coming in August all applications for residence under the Skills Migrant Category must meet the minimum income threshold (currently 23.49 per hour). Your job offer will still need to be assessed as "skilled" to be eligible for points. If your job is not skilled then you may still be eligible for points if your salary is over 1.5 the national median income (currently about $35 per hour).
Skilled jobs generally are those that are considered skill levels 1-3 in ANZSCO.
David Fisher LLB
Www.capitalimmigrationservices.co.nz