Congratulations. Your score indicates you are most likely working quite well with your stakeholder. Perhaps they present a greater challenge than others and you need to improve how you engage with them. Think about how you might understand them and their needs better and work with them to find even better solutions. And think about how you could be more thoughtful in your communication with them. Increase your use of the power of pictures and stories.
For more in-depth advice, you may like to read my book Winning Conversations: How to turn red tape into blue ribbon or sign up to my Persuasive Advisor Program.