Are you particularly thinking about a career in business? If you're not then I wouldn't advise it, I did SG and that was bad enough and my friends that did the Higher said much the same as Dado Prso! Instead of Bus Man why not think about a foreign language? Having a Higher in a Modern Language indicates you have a lot of skills that many universties/employers look for (ie. communication, knowledge of other cultures blah blah blah) Many universities accept maths as a science now, so even with maths and one of physics or chemistry you'd be fine for many sciencey courses. And with English, History and a foreign language you'd be set for any arts/social science courses.
Or you could drop Bus Man and do physics AND chemistry if you're particularly sciencey! Decisions decisions!
I did Highers in English, French, German, Modern Studies and Biology and was accepted to both arts (modern languages) and science (speech and language pathology) course unconditionally. More and more, getting into university is reliant on your personal statement/references and interview (if applicable) IMO