Here is a link further discussing Blood Pressure Values. Now, I'm a little unsure what you are stating with your 104/105 reading. If that is your systolic readings (top number) than that may be normal for you and okay for you as long as you are not symptomatic (for example, fatigue, lightheaded, dizziness, feeling faint.) It is not a high reading by any means, it would be considered lower than the norm. You may want to discuss this with your physician to see if he/she is comfortable where your blood pressure is running.
The 104/105 is impossible to have for a systolic/diastolic number, that would be an error. Systolic is always the top number and is higher than your diastolic number and there is also always a greater difference between the two(systolic/diastolic mean value).