Yes, scoring 75 points makes you eligible and increases your chances of receiving an Invitation to Apply (ITA) for Australian Permanent Residency (PR). The minimum required is 65 points, so 75 points gives you a competitive advantage in the skilled migration program, especially for visas like the Skilled Independent (subclass 189) or Skilled Nominated (subclass 190).
Your nominated occupation must be on the current Skilled Occupation List, and you should have a positive skills assessment. Keeping your documents complete and up-to-date helps avoid delays. In summary, 75 points is a strong score that can help you secure PR faster if all other criteria are met.